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	Approach for GPS precise time transfer using an augmentation information and zero-differenced PPP model 期刊论文 OAI收割 IET RADAR SONAR AND NAVIGATION, 2018, 卷号: 12, 期号: 8, 页码: 801-806 作者: Tu, Rui; Zhang, Pengfei; Zhang, Rui; Liu, Jinhai; Lu, Xiaochun \| 收藏 \| 浏览/下载：19/0 \| 提交时间：2021/11/29 Global Positioning System GPS precise time transfer approach augmentation information zero differenced precise point positioning model Global Positioning System PPP ionosphere delay troposphere delay receiver clock phase ambiguity ephemeris residual stability
	Study on spectrograph for ionosphere: A broadband imaging instrument prototype for far-ultraviolet (EI CONFERENCE) 会议论文 OAI收割 International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China 作者: Wang S.-R.; Lin G.-Y.; Yu L. 收藏 \| 浏览/下载：35/0 \| 提交时间：2013/03/25 Current research on space-based exploration for the ionosphere needs more advanced technologies. Because the spectral signals in the ionosphere distributing basically in the far-ultraviolet waveband are very weak. Usual spectrometer structures and detectors such as CCD can't receive enough information. Based on this principle of atmospheric sounding the imaging spectrometer prototype for ionosphere detection application was designed to solve the problem. This prototype consists of the telescope and the imaging spectrometer. The simple structure and small number of mirrors can help higher transmission efficiency be achieved and weak signals detection be implemented. The telescope is an off-axis parabolic mirror and the spectrometer is a modified Czerny-Turner spectral imaging system. Modified Czerny-Turner spectrometer contains a spherical mirror a fixed plane grating and a toroidal mirror. By adjusting the incident angle to the collimating mirror and using toroidal mirror coma and astigmatism were corrected well. We also optimize distances between the grating to the focusing mirror and the focusing mirror to the image plane to improve disadvantages of traditional Czerny-Turner structure. Designed results demonstrate that aberrations are substantially corrected and high image quality can be obtained in broad waveband. The photon counting Wedge-Strip-Anode detector with micro-channel planes as the receiving plane is accepted for the instrument prototype. The other photon counting 2-D detector responding well for weak light such as Cross-Delay line detector and MAMA detector can also be used for detection. The calibration and performances testing system is made of a vacuum system a deuterium lamp a monochrometer and the instrument prototype. Results obtained from the experiment show that the spectral resolution is 2.4 nm and the spatial resolution is 80 m. The other calibration experiments are running. The technology of the spectrometer prototype is important for the research and applications of ionosphere remote sensing. 2011 SPIE.
	Regional Validation of Jason-2 Dual-Frequency Ionosphere Delays 期刊论文 OAI收割 MARINE GEODESY, 2010, 卷号: 33, 期号: 1, 页码: 272-284 作者: Tseng, Kuo-Hsin; Shum, C. K.; Yi, Yuchan; Dai, Chunli; Lee, Hyongki 收藏 \| 浏览/下载：41/0 \| 提交时间：2015/08/19 Ionosphere delay total electron content Satellite altimetry